Re: Not able to understand how to write group by - Mailing list pgsql-general

On 7/3/2014 4:01 AM, Arup Rakshit wrote:
> Exactly.. I am done. Here is the ORM query :-
>
>   def self.employee_learning_by_gender(question_id)
>     cpd_id = Measure.find_by(option: 'CPD').id
>     other_id = Measure.find_by(option: 'Others').id
>     User.select("view.gender, sum(view.participant) as participant,
> sum(cpd) as cpd, sum(other) as
> other").from(User.joins(daily_action_answers:
> [:measure]).group("users.gender, daily_action_answers.measure_id")
>       .where("((daily_action_answers.day between ? and ?) and
>                daily_action_answers.daily_action_id = ?)",
>                Date.today, Date.today.end_of_year,
>                question_id
>              )
>       .select("users.gender, count(*) as participant,
>                case when daily_action_answers.measure_id = #{cpd_id}
> then avg(daily_action_answers.value) end as cpd,
>                case when daily_action_answers.measure_id = #{other_id}
> then avg(daily_action_answers.value) end as other"
>              ), :view).group("view.gender")
>   end

OT, but it boggles my mind that anyone thinks thats 'better' than the
straight SQL


--
john r pierce                                      37N 122W
somewhere on the middle of the left coast